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Author : Anonim
Publisher : Unknown
Page : 25 pages
File Size : 45,7 Mb
Release : 1968
Category : Electronic
ISBN : UOM:39015087108901
Author : Anonim
Publisher : Unknown
Page : 1460 pages
File Size : 54,6 Mb
Release : 1991
Category : Aeronautics
ISBN : UIUC:30112001077426
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author : Anonim
Publisher : Unknown
Page : 1142 pages
File Size : 41,8 Mb
Release : 1973
Category : Nuclear energy
ISBN : UOM:39015026176464
Author : Nabil M. El-Hady
Publisher : Unknown
Page : 124 pages
File Size : 53,6 Mb
Release : 1982
Category : Unsteady flow (Aerodynamics)
ISBN : NASA:31769000506439
Author : Institute for Computer Applications in Science and Engineering
Publisher : Unknown
Page : 52 pages
File Size : 48,8 Mb
Release : 1990
Category : Electronic
ISBN : NASA:31769000682693
Author : Anonim
Publisher : Unknown
Page : 974 pages
File Size : 51,7 Mb
Release : 1999
Category : Aeronautics
ISBN : STANFORD:36105021811372
Author : F. M. O'Hara,Ann S. Klein
Publisher : Unknown
Page : 340 pages
File Size : 45,6 Mb
Release : 1969
Category : Technical reports
ISBN : UOM:39015095261619
Author : International Atomic Energy Agency
Publisher : Unknown
Page : 812 pages
File Size : 49,5 Mb
Release : 1968
Category : Nuclear energy
ISBN : UCAL:B3246754
Author : Anonim
Publisher : Unknown
Page : 568 pages
File Size : 51,6 Mb
Release : 1973
Category : Mechanics, Applied
ISBN : UCAL:C2682441
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
Page : 72 pages
File Size : 45,6 Mb
Release : 2018-07-10
Category : Electronic
ISBN : 1722678224
The Goertler vortex instability mechanism in a hypersonic boundary layer on a curved wall is investigated. The precise roles of the effects of boundary layer growth, wall cooling, and gas dissociation is clarified in the determination of stability properties. It is first assumed that the fluid is an ideal gas with viscosity given by Sutherland's law. It is shown that when the free stream Mach number M is large, the boundary layer divides into two sublayers: a wall layer of O(M sup 3/2) thickness over which the basic state temperature is O(M squared) and a temperature adjustment layer of O(1) thickness over which the basic state temperature decreases monotonically to its free stream value. Goertler vortices which have wavelengths comparable with the boundary layer thickness are referred to as wall modes. It is shown that their downstream evolution is governed by a set of parabolic partial differential equations and that they have the usual features of Goertler vortices in incompressible boundary layers. As the local wavenumber increases, the neutral Goertler number decreases and the center of vortex activity moves towards the temperature adjustment layer. Goertler vortices with wavenumbers of order one or larger must necessarily be trapped in the temperature adjustment layer and it is this mode which is most dangerous. For this mode, it was found that the leading order term in the Goertler number expansion is independent of the wavenumber and is due to the curvature of the basic state. This term is also the asymptotic limit of the neutral Goertler numbers of the wall mode. To determine the higher order corrections terms in the Goertler number expansion, two wall curvature cases are distinguished. Real gas effects were investigated by assuming that the fluid is an ideal dissociating gas. It was found that both gas dissociation and wall cooling are destabilizing for the mode trapped in the temperature adjustment layer, but for the wall mode trapped near the wall the ef...
Author : Anonim
Publisher : Unknown
Page : 660 pages
File Size : 40,8 Mb
Release : 2024-07-01
Category : Noise
ISBN : PSU:000012737512
Author : C. David Andereck,F. Hayot
Publisher : Springer Science & Business Media
Page : 351 pages
File Size : 40,9 Mb
Release : 2012-12-06
Category : Science
ISBN : 9781461534389
Seldom does a physical system, particularly one as apparently simple as the flow of a Newtonian fluid between concentric rotating cylinders, retain the interest of scientists, applied mathematicians and engineers for very long. Yet, as this volume goes to press it has been nearly 70 years since G. I. Taylor's outstanding experimental and theoretical study of the linear stability of this flow was published, and a century since the first experiments were performed on rotating cylinder viscometers. Since then, the study of this system has progressed enormously, but new features of the flow patterns are still being uncovered. Interesting variations on the basic system abound. Connections with open flows are being made. More complex fluids are used in some experiments. The vigor of the research going on in this particular example of nonequilibrium systems was very apparent at the NATO Advanced Research Workshop on "Ordered and Turbulent Patterns in Taylor Couette Flow," held in Columbus, Ohio, USA May 22-24, 1991. A primary goal of this ARW was to bring together those interested in pattern formation in the classic Taylor Couette problem with those looking at variations on the basic system and with those interested in related systems, in order to better define the interesting areas for the future, the open questions, and the features common (and not common) to closed and open systems. This volume contains many of the contributions presented during the workshop.
Author : Anonim
Publisher : Unknown
Page : 680 pages
File Size : 41,9 Mb
Release : 1973
Category : Mechanical engineering
ISBN : UCAL:B4419582
Author : Tōhoku Daigaku. Kōsoku Rikigaku Kenkyūjo
Publisher : Unknown
Page : 898 pages
File Size : 48,7 Mb
Release : 1971
Category : Mechanics
ISBN : STANFORD:36105001487433
Author : Anonim
Publisher : Unknown
Page : 792 pages
File Size : 40,9 Mb
Release : 1972
Category : Fluid mechanics
ISBN : NYPL:33433022793875